A new scaling law for analyzing power in hadron production by transverselypolarized baryons

Experimental data on analyzing power for inclusive meson and baryon product ion in collisions of transversely polarized protons and antiprotons with pr otons and light nuclei have been analyzed. It is found that the existing da ta can be described by a simple function of collision energy (root s), tran sverse momentum (p(T)) and a new scaling variable x(A) = E/E-BEAM. At beam energies above 40 GeV and pr above 1.0 GeV/c the analyzing power is describ ed by a function of x(A) and p(T) only (A(N) = F(p(T))G(x(A))) for both pol arized proton fragmentation and central regions of proton-hadron collision. Comparison of data from Fermilab and new IHEP data measured using 40 GeV/c polarized proton beam was most decisive for the revelation of the above re gularities. This new scaling law allows one to predict the analyzing powers for kinematic regions, not yet explored in experiments and constrains mode ls of strong interactions. The new scaling law allows one also to use some reactions as polarimeters for experiments with a polarized beam.